Burglar-alarm.



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` APPLICATION FILED PREA?. 1907.

` WHA/55555:

A froze/v5 ys UNITED sTATEs PATENT oEEroE.

GRANVILLE A. HUMASON, OF NATCI-IEZ, MISSISSIPPI, ASSIGNOR OF ONEFOURTH'IO ELLEN O. RIORDAN, OF WASHINGTON, DISTRICT OF COLUMBIA.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented Dec. 17', 1907.

Application filed February 27,1907. Serial No. 359,608.

T 0 all whom 'it may concern:

Be it known that I, GRANVILLE A. HUMA- SON, a citizen of the UnitedStates, residing at Natchez, in the county of Adams and State ofMississippi, have invented a new and useful Burglar-Alarm, of which thefollowing is a specilication.

This invention relates to burglar alarms of that character utilizingpercussion caps designed to be exploded when the alarm is actuated.

The object of the invention is to provide a simple form of apparatushaving means whereby misfiring of the device is prevented.

A still further object is to provide means whereby the alarm can beactuated either by the raising of a lower sash or the lowering of anupper sash of a window.

A still further object is to provide means whereby the alarm can bereadily placed out of operative position when it is desired to raise orlower the sashes without actuating the alarm.

With these and other objects in view the invention consists of certainnovel features of construction and combinations of parts which will behereinafter more fully described and pointed out in the claims.

In the accompanying drawings is shown the preferred form of theinvention.

In said drawings: Figure 1 is a perspective view of the alarm and itsactuating means; and Fig. 2 is a plan view of the trigger and itssupporting bracket.

Referring to the figures by characters of reference, 1 is a base stripdesigned to be fastened to a window jamb 2 by means of screws or in anyother preferred manner and extending from one end of the strip is abracket 3 having a notch 4 in its free end. An arm 5 is fulcrumed uponthe bracket and is provided at one end with oppositely ex tendingangular branches 6 either of which is designed, when arm 5 is disposedat right angles to bracket 3, to practically close the open end of notch4 so as to lock any object which may be placed therein.

Extending from the base strip 1 at a point removed from bracket 3 is anarm 7 the free end of which is enlarged as shown at 8 and has a bore 9designed to receive a cartridge 10. A hammer 11 is pivotally connectedto the arm 7 near the base strip 1 and is so disposed that the headthereof will positively strike the cap of the cartridge when the hammeris swung downward. A stem 12 projects from the head of the hammer and isdisposed to enter the notch 4 and be retained by either of the angularbranches 6.

In order that the hammer may be automatically swung downward against thecap of the cartridge as soon as the stem 12 is released a spring wire 13is secured at one end within the arm 7 as shown at 14 and is bent into acoil below said arm. The wire extends upward from this coil and has itsend 'hooked as at 15 so as to embrace the hammer near the head thereofand exert a con* stant downward pressure thereagainst.

In order that the alarm may be actuated either by the raising of thelower sash 16 or the lowering of the upper sash 17, mechanism of novelconstruction has been provided. This mechanism consists of a rod 18slidably mounted within a guide 19, preferably an eye screw, and thisrod has a downwardly inclined portion 20 the end of which is bentbackward thereunder and parallel therewith, as shown at 21, and mountedwithin a guide eye 22. An arm 23 extends laterally from the upperportion of the rod 18 and a spring 24 surrounds a portion of the rod andbears at opposite ends against this arm and the eye 19 respectively. Itis of course understood that the eyes 19 and 22 are fastened to thelower sash 16 and whenthe alarm is set the arm 5 of the trigger extendsover the inclined portion 20 of rod 1S. A bracket 25 is fastened to theupper sash 17 and has an arm 26 pivotally connected to it so as to movehori- Zontally. The bracket is so arranged that when. the sashes are intheir normal or closed positions arm 26 can be swung into positiondirectly above the arm 23.

Vhen it is desired to set the alarm the sashes are closed and the hammer11 is swung toward the strip 1 until the stem 12 thereof is seated innotch 4. Arm 5 is then swung toward the window sash and into positionabove the inclined portion 20 of the actuating rod. lThis will causeoneoll the branches 6 to assume a position in front of the stem 12 andthereby lock it against movement. Arm 26 is swung into position abovethe arm 23 and a cartridge 10 1s inserted into the bore 9, Should thesash 16 be raised the ninclined portion 20 will act as a cam and willhammer downward against the cap of the cartridge and cause it toexplode. As the hammer is pivoted to the arm 7 it must necessarilystrike the cap and there is therefore no danger of a misfire. If theparts are set in the manner hereinbefore described and the upper sash 17is pulled downward arm 26 will force rod 18 downward against the tensionof spring 24 and the end portion 21 of the rod 18 will be guidedlaterallyT by eye 22 so that rod 18 will force the arm 5 forward andrelease the stem '12. Should it be desired to raise or lower the sasheswithout actuating the alarm the arm 26 is swung upon its pivot towardthe glass in the sash 17 and the hammer 11 is carefully released andlowered onto the cartridge. Arm 5 can then be swung out of the path ofthe extension 20 and the two sashes can be raised or lowered withouthindrance.

It will be seen th at the entire device is very simple, durable andefficient, and can be constructed at slight cost. It can be easilyconnected to window sashes and when so connected and set constitutes aneffective means for frightening burglars. as well as alarming theoccupants of the building.

vWhat is claimed is:

1. A device of the character described comprising a base strip, an armextending therefrom and having a cap receiving bore, a hammer pivotallyconnected to the arm and disposed to positively strike the cap, a springsecured upon the arm and exerting a constant pressure against thehammer, a stem extending from the hammer, a bracket upon the base striphaving a stem receiving notch, and a trigger pivoted upon the bracketand comprising an arm and oppositely extending angular branches eitherof which is disposed to retain the stem within the notch.

2. A device of the character described comprising a cap holding device,a spring actuated hammer, a trigger for holding the hammer in retractedposition, and means for actuating the trigger, said means comprising aspring supported rod having an inclined portion disposed to lap thetrigger and designed to actuate the trigger when said inclined portionis moved thereagainst.

3. The combination with a cap holding device, a spring actuated hammer,and a trigfor connecting said rod and inclined portion to a sash, an armextending from the rod, and an actuating arm disposed to be connected toa sash and overlap the arm of the rod, said inclined portion of the rodbeing disposed when moved in one direction to directly contact with andto shift the trigger, and means engaging said inclined portion whereby,when the rod is moved in the opposite direction, said rod will bedirected against the trigger.

5. The combination with a cap holding device, a hammer, and a triggerfor holding the hammer in retracted position of upper and lower sashes,a spring supported rod 'slidably mounted upon one of the sashes andhaving an inclined portion disposed to actuate the trigger when saidsash is raised, guides for the rod and its inclined portion, and meansupon the other sash disposed, when said sash is lowered, to actuate therod and direct it against the trigger.

6. The combination with an upper and a lower sash, a cap holding deviceadjacent thereto, a hammer, and a trigger; of a spring supported rodhaving an inclined portion disposed to actuate the trigger, guides forthe rod and its inclined portion and connected to the lower sash, an armupon the rod, and an actuating arm pivotally connected to the upper sashand movable into position above the arm of the rod.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature inthe presence of two witnesses.q

GRANVILLE A. HUMASON.

Witnesses:

E. HUME TALBERT, HERBERT D. LAwsoN.

